Typewriting-machine



F. H. ARMSTRONG.

TYPEWRITING MACHINE.

APPLICATION man ocr. 16,1917. RENEWED SEPT-24, 1919.

1,375,3%%= Patented Apr. 19, 19210 2 SHEETS-SHEET1.

754,7 GU01 M21 4 I F. H. ARMSTRONG. TYPEWRITING MACHINE. APPLICATIPNFILED OCT. 16.1917. RENEWED sEPT.24. 1919.

Patented Apr. 19, 192E 2 SHE'ETS*SHEET 2.

at far.

FRANK H. ARMSTRONG, OF AUBURN, NEW YORK, ASSIGNOIR, TO CORONA TYPEWRITERCOMPANY, INC., OF GROTON, NEW YORK, A CORPORATION OF NEW YORK.

TYPEWRITING-MACHINE.

Specification of ietters Patent.

Patented Apr. 19,1921.-

Application filed October 16, 1917, Serial No. 196,867. Renew dSeptember 24, 1919. Serial No. 325,962.

To all whom it may concern:

Be itknown that I, FRANK H, ARMSTRONG,

1 a citizen of the United States of America,

and a resident of Auburn, county of Cayuga, State of New York, haveinvented certain new and useful Improvements in Typewriting-Mac-hines,of which the following is a full and clear specification.

This invention has particular reference to the means for supporting andguiding the platen carriage, and the object of the-invention is toprovide simple means whereby the carriage will be assured of an easy,

steady movement, devices being provided for compensating for wear andfor slight unevenness of the anti-friction ball raceways, as more fullyhereinafter set forth.

Referring to the annexed drawingsand itssupport;

Fig. 2 is a bottom view thereof; Fig. 3 is an end elevation thereofpartly in section, taken on the line 33 of Fig. 1,

Fig. 4 is a fragmentary transverse section through the race-way havingthe movable flange or member;

Fig. 5 is a horizontal section on the line 5-5 of Fig. 3;

Fig. 6 is a vertical longitudinal sectional View on the line 6-6 of Fig.5;

Figs. 7 and 8 are side elevations of'two slightly difl'erent forms ofball spacers; and

Fig. 9 is a detail view showing a modification of the stop for theyieluable raceway. 1

Referring to the drawing by reference characters, it will be observedthat the carriage consists of a sheet metal plate awhose ends are bentup at Z) to form supports for the platen c and whose longitudinal edgesare bent downwardly the full length of the;

plate (1 to form a pair of depending flanges (Z, these flanges beingformed with longitudinal race-way channels 6, which face inwardly, thatis, toward each other. 7

The supportingor base plate f is aflixed to the frame bars 10 of thecarriage frame and is provided with longitudinally extending upstandingflanges g bent to form outwardly facing ball channels it, it, thesechannels h, it being complementary to the outer channels 6 so that theanti-friction balls 2' are received 1 between each pair of channels. Oneof the Figure 1 is a rear elevation of a carriage g is formed integralwith the baseand the other is pivotally connected theret and has alimited inward and outward swing. This movable flange is. normallypressed outwardly by a pair of springs j, ea 1 consisting of a .fiatplate fastened tothe nder side of the base-plate f and hav-. ingts freeend extending up through an ope ing therein and bearing againsttheconvex /side of the channel it in the adjacent movable flange g, tothereby press said movable flange outwardly and maintain the' balls atboth sides of'the carriage in operative position and compensate forunevenness in the tracks as well as for. wear. To further compensate forunevenness in the track due to imperfection of manufacture, or

presence of grit, or slighttwisting or disthition of the track members-Idivide the swinging member or flange into two parts,

division being made at k, about midway the ends of the swinging trackmember, one of the springs jbeing arranged to bear against each ofthesections of the track member.

Two ballsare arranged in each race-way,

one at each side of mid-length of the carriage, by means of'a spacingbar Z, this-bar extending across break 70 in the movable track-member gand serving to restrict'the' travel of each ballin the race-way to onesection of the: divided track member or flange. To-prevent an excessivemovement of this anti-friction device ineither direction, I providestop-screws m in the raceways. Each of the spacing bars Z, is providedwith a head i at each end, in which w'ay flange g away from itscompanion raceway flange (Z. To prevent this abnormal tilting of thebar, I provide each of the heads 71 with a pair of projections 2' whichextend respectively upwardly and downthe body of the base plate 7. Thesechair 1* wardly far enough beyond the race-way grooves to strike againstthe adjacent flat faces of the flanges'd and g and thus serve tomaintain the spacing bar approximately edgewisely vertical under allconditions. This non-jamming spacing member orbar willbe particularlyadvantageous in use on a Corona machine, in View of the fact that inthat machine the platen-carrying member of the carriage is frequentlysubjected to downward and lateral thrusts in folding and unfolding theplaten carriage frame, the bars 10 of which are shown in thedrawin as Toprevent excessive swinging inwardly of the movable race-way flange, Iprovide a series of set screws ntapped upwardly through the'supportingplate f and so positioned as to form stops against which the channelportion-h of the flange strikes in case the flange is forced an unduedistance inwardly. .A lock nut 0 is provided on each of the set screwsfor looking it in its ad justed position. Instead of set screws, ,1 may,asshown in Fig. 9, form a non-adjustable stopfn, by striking up aportion of nel-flange stops are particularly advantageous in that theyprevent the. movable channel member from being swung inwardly far enoughto permit the platen-carrying -memberfbeing disconnected from the basemember of the'" carriage. These arresting stops are particularlyadvantageous in a. machine of the Corona type in which theplaten-carrying member, in the act of folding and unfolding theanachine,is exceedingly' liable to be subjected to transverse thrusts; V

I The sections ofv the movable flange 9 formed with the race way'h arepivotally connected to the base-plate by having each of the sectionsprovided at each end with a hook lug 0 extending through the base plateand engaging theunder side of the plate. The hook lug 0 at the outer endof .each of the sections engages in a notch 10 formed in the end of thebase-plate and the hook lug 0' at the inner end of each section extendsthrough one of the spaced longitudinal slots 9 formed in the plate 7",the slots 9 being long enough to permit the hooks 0 to passtherethrough.In assembling, the hook lug 0' at the inner 'end of. each section isinserted through the adjacent slot 1 and then the section is movedlongitudinally until the shank of the outer hook l'ug engages in notchp. The free ends of both hook'lugs on each section will then engage theunder side of the base-plate. When each section is assembled on thebase-plate in this manner, the two ends thereof meet at the joint 70,and the two sections are locked in this assembled relation by means of aplate 1' fastened to the under side of the base or supporting plate. fby screws 8 and prochines, such as the vided'with'lugs t engaging behindthe two center lugs 0'. held against outward sliding action, wlth Thetwo sections are thus their hook-shaped ends engaging under thebase-plate-f. The slots? and g are sufliciently wide, compared with thethickness of the plates from which the sections of the movable racewayflange are formed, to permit a limited swinging movement of the sec-1tions, the movement of each section being independent of the othersection. The rear A longitudinal edge of the base plate f is bentupwardly to form a longitudinal flange u to stilfen the plate.

It will be observed that the race-way flanges 9 .carried by the baseplate are formed with flat upper edge portions extended to nearthe'under face of the platencarrying plate This not 'only aids instiffening the flanges onthe base plate, thus permitting them to beconstructed of, thin gage. sheet metal, but also permits these flanges gto function as stops in case the I platen-carrying plate a is forceddownwardly with'sutlicient severity to cause the movable race-way h to.be swung inwardly .far enough to .permit the said plate a to displacethe balls occurs when the carriage of the Corona machineis lifted andthrown backwardly into operative position, as well as when the carriages swung forwardly and dropped down into compact position.

The nature. and scope of the invention having been thus indicated andits preferred embodiment having been specifically. de-

scribed, what is claimed as new is:

1. In comblna'tion, a platen carriage and a support therefor, thecarriage and the support being provided with cooperating racewayflanges, one of the flanges being movable and means being provided fornormally pressing it toward its companion flange, said movable flangebeing composed of independently-movable sections, for the purpose setforth.

2. In combination, a platen carrying member provided with a pair ofrace-way flanges,

a supporting member likewise provided with' a pair of race-way flanges,anti-friction balls in the race-ways formed by said flanges and meansfor spacing the balls so as to main-, tain them at opposite sides of. apoint midlength of the platen-carrying member, one of said racewayflanges being divided into two parts both parts being pivotallyconnected to one of saidmemb'er's, and'ineans for normally pressing saidsectional raceway flange against the balls, for the purpose set forth.

,3. In combination, a platen-carriage member having race-way flanges, asupporting member having complementary raceway flanges, one of saidflanges having a limited pivotal movement on one of said members, andstops arranged on this latter member to engage the movable race-wayflange to prevent undue movement thereof.

' 4. The combination with two sheet metal members one adapted to supporta platen and the other adapted to be attached to the frame of themachine and each being provided with a pair of race-way flanges, theflange on one of the members being, movable toward and from itscompanion race-way flange, of springs fastened to the member carryingsaid movable race-way flange and bearing normally against the flange toforce it toward its companion race-wayflange.

tachment to the typewriting machinea'nd.

5. In combination, a pair ofsheet metal members one being adapted tosupport the platen and the other bein adapted for ateach provided with apair of race way flanges, one of the flanges on one of-the members beingmovable toward and from its companion flange, this movable flange beingsectional and the connection between each section and its supportingmember consistng ofhook-shaped lugs engaging 'in, openings in saidmember, means being providedfor holding these' lugs in locked position.

6, In combination, a. platen-carriage plate, 7 a base-plate, race-wayflanges carried by, said plates, one of said flanges being pivotallyconnected to one of said plates and being sectional, the connectionbetween each section and the plate consisting of a pair of hook-shapedlugs extending through openings in theplate and engaging the oppositeside thereof, anda locking device on the plate.

7. A platen supporting structure, comprising a traveling carriage havingraceway channels, a sheet metal carriage bed having a rigid integralflange at one edge formed with a raceway channel and a longitudinalstiffening flange at its opposite edge, a racef way member divided inteindependently movable sections each having a rocking connection at oneedge with the bed adjacent said stiffening .flange' and formed witli aracewaychannel, anti-friction rolling"ele-' ments' in the racewaysformed by said chan 'nels, and means for yieldably pressing the sectionsof said divided member against the anti-friction elements.

8. 'A platen-supporting structure, comprising a sheet metal travelingcarriage having depending raceway flanges, a sheet metal carriage bedhaving an upstanding integral raceway flange at one edge and adetachable raceway channel member adjacent its opposite edge having arocking connection with the base of the bed, the integral bed flange andsaid raceway channel member being inclosed within the flanges on thecarriage and having upwardly extending vertical portions above theraceway channels the upper edges of which lie closely adjacent the underside of the carriage, anti-friction rolling elements in the raceways,and means for yield ably forcing the rocking raceway member toward itscompanion raceway flange on the carriage.

9. A platen-supporting structure,comprising a sheet metal travelingcarriage having depending raceway flanges, a sheet metal carriage bedhaving an upstanding integral raceway flange at one edge and adetachable raceway channel member adjacent itsppposite edge having arocking connection with the baseof the bed, the integral bed flange andsaid raceway channel member being inclosed within the flanges on thecarriage and having upwardly extending vertical portions above theraceway channels the upper edges of which lie closely adjacent the underside of the carriage, anti-friction rolling. elements .in the raceways,and means for yieldably forcing 'the' rocking raceway member toward itscompanion raceway flange 0n the carriage, and integral stop lugs stampedfrom the carriage bed for limiting the movement 9f the rocking racewaymember away from its companion raceway flange.

10. In combination, a I plate member tween the support andplaten-carrying means comprising two race-ways and a plurality ofrolling elements confined in said race-ways, one member of one of saidr'aceways being divided into independently yieldable sections alongea'chof which one rolling element is adapted to travel.

12. In a typewriting machine, the combination of a support,platen-carrying means, and an anti-friction bearing interposed betweenthe support and platen-carrying means comprising two race-ways andgroups of opposed rolling elements confined in said race-ways, onemember of-one race-way being divided into independently yieldablesections with each of which one group of opposed rolling elements,cooperate.

13. In a typewriting machine, the combination of a platen carriage, asupport for the carriage, and an anti-friction bearing interposedbetween the carriage and its suprace-w ays,'each rolling element in theraceway having the divided member being adapted to travel along'a singlesection of the divided" member. a 14. The combination of, a pair ofsheet metal members, one of which is adapted to support aplaten andtheother of whichis adapted for connection with the frame of atypewritmg machine, each of said membersbeing provided with a pairo'frace-way flanges adapted to cooperate with the flanges T on the othermember, one flange on one memher being divided into sections which areindependently movable toward and from the cooperating flange,interlocking rocking connections between each section of the di- V'ldfidflange and its supporting member, in-

, dependent means for normally pressing each section of the dividedflange toward itscooperating flange, and rolling elements confined inflanges.

15. Thecombination of a sheet metal platen carriage formed with integralde-' pending race-way flanges, a sheet metal base plate provided withrace-way flanges ex-I tending upwardly within the depending vflangesonthe carriage, one of theflanges,

on the base plate having an interlocking rocking connection with thebaseiplate, resilient means for normally forcing said latter flangetoward the cooperating flange on the carriage, and anti-friction ballsconfined in the race-ways formed by said flanges. V

16. The combination of 'a sheet metal member adapted to support aplatenand formed with integral depending race-way flanges, a sheet metal basetor supporting.

the' platen supporting member provided with race-wayflanges extendingupwardly between the flanges on the platen supporting member, one of theflanges on said base being divided into independently movablesections,each 01": which is detachably held to the base by hook lugsforming a rocking connection, means for normally forcing each section ofthe divided flange toward its co operating flange, and anti-frictionballs confined to the race-ways formed by the flanges.

17. An anti-friction support for a platen, comprising two membersprovided with c'ooperating pairs of race-way flanges, one of saidflanges being divided into sections movable independently toward andfrom its cooperating flange, a plurality of anti-triction balls confinedin the race-ways formed by the flanges, and means for maintaining theballs in spaced relation and restricting.

the race-ways formed by said ellng the raceway channels.

of which isformed with a pair of integral race-way flanges and the otherof which is provided with an integral race-way flange and a movablerace-way flange cooperating v with the flanges on'the other member, saidmovable flange being divided intosections each of which has aninterlocking rocking connection with its supporting member, in-

dependent resilient means for normally forcing each section ofthedivided flange toward its coflperating flange, anti-frictionballs'iconfined 'in the race-ways formed by the flanges, and means forrestrictlng the travelofeach ball in the race-way having the divid'edflange to a single section of the divided flange.

the travel of each ball in the race-way hav- '19,. Thebo'mbinationj of aplaten carriage having raceway channels and flat facesat both sides ofthe channels, a pair of nontraveling raceway members having racewaychannels cooperating with the channels on the, carriage'and formed withflat faces at both sides, of thechannels, one of said nontravelingmembers being divided into sections movable independently toward andfrom the adjacent channel on the carriage,

rolling elements in the raceways, and a bar loosely hung on the rollingelements in each raceway and having a pairof oppositelyextendingprojections adj'acent'each end travbetween the flat faces at the sidesof i 20. The'combination of a platen carriage having raceway channelsand flat faces at both sides of the channels, a, pair of nontravelingraceway members having raceway channels coiiperating with the channelson the carriage and formed with flat faces at both sides of thechannels, one of said nontraveling mer'nbersv being divided intosectionsmovable independently toward and from the adjacent channel on' thecarriage, rolling elements in the raceways, and a bar loosely hung onthe rolling elements in each raceway and having a pair of oppositelyextending projections adj acent' each end traveling between the flatfaces at the sides of the raceway channels, and means carried by thenon-traveling raceway members adjacent each endthereot adapted to engage"the rolling elements at the opposite ends of the bars to restrict thetravel of the rolling elements.

21. A platen support, comprising a sheet" metal traveling member havingraceway flanges, a sheet metal stationary member having raceway flanges,all of said flanges having flat faces at opposite sides of the racewaychannels and one of said flanges being divided midway its length intosections having rocking connections with their supporting member, meansfor yieldably forcing the sections of the divided flange toward itscooperating flange, a pair of balls in'each raceway,'a spacing bar ineach raceway having eyes adjacent each end thereof to receive ,theballs, and lugs adjacent each end of the spacing bars traveling betweenthe flat faces of the flanges.

22. A platen support, comprising a sheet metal traveling member havingraceway flanges, a sheet metal stationary member having raceway flanges,all of said flanges having flat faces at opposite sides ofthe racewaychannels and one of said flanges being divided midway its length intosections having rocking connections with their supporting member, meansfor yieldably forcing the sections of the divided flange toward itscooperating flange, a pair of balls in each raceway, a spacing bar ineach raceway having eyes adjacent each end thereof to receive the balls,and lugs adjacent each end of the spacing bars traveling between theflat faces of the flanges, and stops carried by the flanges onthestationary member adjacent each end thereof adapted to engage the balls,said stops and the spacing bars cooperating to limit the travel of eachball to one side of mid-length of the stationary member.

4 23. In combination, a platen-carriage member having race-way flanges,a supporting member having complementary raceway flanges, one of saidflanges having a yielding movement on its carrying-member, and a stop toprevent undue movement of the movable flange away from its complementaryflange.

24. In a typewritingmachine carriage, a sheet metal base member providedwith upstanding race-way flanges, a sheet metal platen-carrying memberprovided with depending race-way flanges, rollin elements in therace-ways formed by said flanges,the flanges on one member extendingabove the ball race-ways and close to the opposing face of the othermember to form stops to limit the downward movement of theplatencarrying member, one of said flanges being laterally yieldabletoward and from its companion race-way flange.

25. The combination of a platen carriage having raceway channels, a pairof stationary raceway members having channels cooperating with thechannels on the carriage, one of said members being divided intoindependently movable sections, means for yieldably forcing saidsections of the divided member toward its companion raceway channel,rolling elements in the raceways, spacing devices for the rollingelements in the raceways, and means for limiting the travel of thespaced balls.

26. In combination, a platen carriage member having race-way flanges, asupporting member having complementary raceway flanges, one of' saidflanges havin a limited movement onits carrying-mem er, and a stoponthis latter member arranged to engage the movable flange to preventundue movement thereof away from its complementary flangeQ 27. In atypewriting machine carriage, a basemember provided with upstandingflanges having race-Way channels, a platencar'rying plate liying over,the top edges of said flanges an provided with depending race-wayflanges, rolling elements in said race-ways, said upstanding flangesextending to near the under face of said platenca'rrying plate, one' ofsaid flanges being laterally yieldable toward and from its companionrace-way flange.

28. In a typewriting machine carriage, a plate member adapted to supporta platen and provided with dependin race-wa flanges, a base plateprovided wit up-stan mg race-way flanges,'one of said race-way Iflan esbeing attached to its carrying plate V plate, and a locking plateengaging said hook-lugs and detachably locking said raceway flange tosaid plate.

This specification signed this tenth day of October, A. D. 1917.

FRANK H. ARMSTRONG.

ook-lugs entering openings 1n said-

